VEHICLE WAS REARENDED AND PUSHED FORWARD INTO A VEHICLE IN FRONT,DRIVER'S SIDE AIRBAG DEPLOYED, CAUSING LACERATION TO FACE AND CHIN AND BURNS ON CHEST.SEATBELTS WERE WORN AT THE TIME, BUT THE PASSENGER SIDE SHOULDER BELT DID NOT RETRACT, RELYING ENTIRELY ON THE WAIST BELT TO HOLD PASSENGER, WHO WAS THROWN FORWARD. *AK *ML